Device for automatically stopping trains



A. FRITZ.v

DEVICE FOR AUTOMAUCALLYSTOPEING TRAINS.

' APPLICATION man uov. 23, i920.

1,388,198. PatentedJumezs,'19.21.-

' 'a L1 n vl'\\` am 1j o l N 'l s o D o O m f" :I

,l `LJ`-`U N n d. *i 'o "qu T rtu i o UNITED STATES ADGLF FRITZ, 0F MAGDEBURG, GERMANY.

DEVICE FOR AUTOMATICAIJLY STOPPING TRAINS.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed November 23, 1920. Serial No. 426,083.

To @ZZ whom t may concern Be it known that I, ADoLF FRITZ, a citizen of the German Republic, residing at Magdeburg, Germany, have invented certain new and useful Improvements in Devices for Automatically Stopping Trains, of which the following is a specication.

This invention relates t0 a device for automatically stoppin@ a train when running past the signals. LDevices having the same purpose have been severally proposed but hitherto it was not possible to use them in actual railroad working. This drawback is partly caused by the fact that such known devices were too complicated and expensive and partly because they were not safe in working. It is the object of the present invention to construct a device of the kind referred to which is as simple as possible and of greatest working safety.

In the accompanying drawing by way of example a modication of the invention is represented; it shows- Figure 1 a side view and Fig. 2 a front view of a device constructed according to the invention.

The device which is connected to the signal and which operates the mechanism on the locomotive, consists essentially of an inclined plane or plate one end of which may be raised by means of a cam or eccentric 2. The locomotive is furnished with a roller 3 so arranged that when the locomotive passes said inclined plate the roller runs on said plate. The eccentric 2, the shaft 4 and the beveled wheels 5 are so connected with the signal 6 that when the signal moves tothe position indicating danger, the eccentrlc 2 raises the plate 1 and when'the locomotive passes the place where the plate 1 is provided, the roller 3 is raised thereby. This raises the lever 7 and the latter a rod 8 as indicated by the arrow A. Thereby a connecting link 9 is displaced on the p in 10 to the right while a connecting rod 11 is raised and displaced to the left, and the lever 12 is turned to the right and displaces the arm 13 which turns the regulating handle 14 to the right till the steam is cut ofi". The arm 13 has a slot 15 by which the handle 14 is moved so that the manual operation of this handle is not hindered by the arm 13. The latter is furnished with a lever 16 which operates the brake-valve 17 so that the air brake of the train comes into play and stops the train. By means of the combination of rods 18 the operating lever of a steam whistle 19 may be connected with the arm 13. The roller 3 after having passed the oblique plate 1 may either return to its initial position or it may be held in its working position by means of a pawl (not shown) till the engineer brings it again into its initial position.

What I claim as my invention is:

In a device for automatically stopping a train when running past a signal, an upright rod (8) carried by the locomotive, an arm (11) connected to said rod, a lever (12) influenced by said arm, a slotted bar (13) connected to said lever, said slotted Varm simultaneously engaging the lever (14) for turning ofi' the steam and also a lever (16) operating the brakevalve (17) for admitting air to the brakes, substantially as set forth.

In testimony whereof I have aiiixed my 4signature in presence of two witnesses.

ADOLF FRITZ. Witnesses:

ADOLF STEER, GUsTAv MEIER. 

